Three-Dimensional Pd<sub>3</sub>Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions

Bu, Lingzheng; Tang, Chaoliang; Shao, Qi; Zhu, Xing; Huang, Xiaoqing

doi:10.1021/acscatal.8b00455

Cited by 107 publications

(71 citation statements)

References 36 publications

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“…To solve this problem, further integrating them into well‐defined 3D porous or hierarchical superstructures with oriented spacial distribution of constituent units may be one of the feasible strategies. For instance, Huang and co‐authors prepared 3D Pd 3 Pb nanosheets (NSs) superstructures, which exhibited greatly enhanced electrocatalytic activity and durability toward both the methanol oxidation reaction and ORR . To the best of our knowledge, there is no report on versatile synthesis of Pd−M alloy NSs superstructures and systematical evaluation of their ORR performances until now.…”

Section: Introductionmentioning

confidence: 99%

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

et al. 2020

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Pd‐based nanoalloys are promising electrocatalysts for replacing Pt‐based ones toward oxygen reduction reaction. Despite that great progress has been achieved, universally synthesizing Pd‐based alloy nanosheets and further integrating them into porous or hierarchical superstructures remain a challenge, and their ORR performances are not systematically investigated. Herein, novel ultrathin and highly wrinkled Pd−M (M=Cr, Mo, W) alloy nanosheets flower‐like superstructures (NSFSs) are universally fabricated via a polyether and small molecules/ions ligand assisted solvothermal method. Such Pd−M NSFSs possess mesoporous structures and co‐exist single‐atom‐like and cluster‐like M species on their surfaces. Compared with pure Pd NSFSs, those Pd−M NSFSs show greatly enhanced ORR activity in alkaline media. Due to the unique microstructure feature, proper alloy constituent and stronger interatomic polarization or electronic coupling, the Pd−W NSFSs show the highest ORR activity with the half‐wave potential of 0.89 V (vs. RHE) and mass activity of 0.46 A mgPd−1 at 0.90 V (vs. RHE), outperforming commercial Pt/C, and most of reported Pd(or Pt)‐based catalysts. Moreover, the Pd−W NSFSs manifest outstanding durability and anti‐CO poisoning ability yet. This work may spur the development of 2D Pd‐based nanoalloy superstructures and promote their applications in fuel cells or other clean energy fields.

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Section: Introductionmentioning

confidence: 99%

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

et al. 2020

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“…Direct methanol fuel cells (DMFCs) are widely recognized as a promising power supply towards electronic portable devices and electric vehicles . Considerable efforts have been directed towards the development of efficient anode catalyst because the methanol oxidation reaction (MOR) is a key reaction in DMFCs . To date, Pt‐based catalysts are regarded as primarily alternative catalysts for the MOR, although high costs and sluggish kinetics are vital factors to hamper their wide commercialization .…”

Section: Introductionmentioning

confidence: 99%

“…[2,3] Considerable efforts have been directedt owards the development of efficient anode catalyst because the methanolo xidation reaction( MOR) is ak ey reaction in DMFCs. [4][5][6][7] To date, Pt-based catalysts are regarded as primarily alternative catalysts for the MOR,a lthough high costs and sluggish kineticsa re vital factors to hamper their wide commercialization. [8][9][10] In addition, the unsatisfied stabilityw ith at endency to aggregate as well as poor tolerance to CO or other carbonaceous intermediates are tremendous problems in methanol oxidation.…”

Section: Introductionmentioning

confidence: 99%

Phase Modulating of Cu–Ni Nanowires Enables Active and Stable Electrocatalysts for the Methanol Oxidation Reaction

Shao

Wang

et al. 2019

Chemistry A European J

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The design and development of non‐noble metal alternatives with superior performance and promising long‐term stability that is comparable or even better than those of noble‐metal‐based catalysts is a significant challenge. Here, we report the thermal‐induced phase engineering of non‐noble‐metal‐based nanowires with superior electrochemical activity and stability for the methanol oxidation reaction (MOR) under alkaline conditions. The optimized Cu–Ni nanowires deliver an unprecedented mass activity of 425 mA mg−1, which is 4.3 times higher than that of the untreated one. Detailed catalytic investigations show that the enhanced performance is due to the large active area, the increased number of active sites (NiOOH), and fast methanol electrooxidation kinetics. In addition, the generated hollow feature in the nanowires provides a unique void space to release the volume expansion, where the activity can be maintained for 5 h without a distinct activity decay. The present work emphasizes the importance of precisely phase modulating of nanomaterials for the design of non‐noble metal electrocatalysts towards the MOR, which opens up a new pathway for the design of cost‐effective electrocatalysts with promising activity and long‐term stability.

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“…Three‐dimensional ordered nanosheet assemblies can increase the surface area to enhance the utilization of atoms, thus promoting both the activity and durability of catalysts . Huang et al . adopted a wet‐chemical method to synthesize 3 D Pd 3 Pb nanosheet assemblies (NSAs).…”

Section: Assembled Nanostructuresmentioning

confidence: 99%

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

Sun

2020

ChemSusChem

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In recent years, research efforts have been focused on the design and fabrication of highly efficient catalysts for liquid fuel cells, because the use of these cells is an important approach for alleviating environmental pollution and energy crises. However, the limitations of the catalytic performance of industrial Pt/C have strongly hindered the development of these fuel cells. The catalyst morphology has a strong impact on its performance; nanostructured catalysts are preferred as they offer large specific surface area and more exposed active centers. In view of this, many catalysts with unique structures have been synthesized in recent years, all of which show excellent catalytic performance characteristics. Despite these achievements, few efforts have been made to survey this field comprehensively. Herein, the recent advances in catalysts for liquid fuel cells are summarized, with a focus on noble metal catalysts with unique morphologies such as nanowires, nanosheets, and assembly structures. Their formation mechanisms are discussed critically. The relationship between the unique morphologies and excellent performance of these catalysts is also explored. This work may provide guidelines for the further development of liquid fuel cells.

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Three-Dimensional Pd₃Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions

Cited by 107 publications

References 36 publications

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

Phase Modulating of Cu–Ni Nanowires Enables Active and Stable Electrocatalysts for the Methanol Oxidation Reaction

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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Three-Dimensional Pd3Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions

Cited by 107 publications

References 36 publications

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

Versatile Synthesis of Pd−M (M=Cr, Mo, W) Alloy Nanosheets Flower‐like Superstructures for Efficient Oxygen Reduction Electrocatalysis

Phase Modulating of Cu–Ni Nanowires Enables Active and Stable Electrocatalysts for the Methanol Oxidation Reaction

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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Three-Dimensional Pd₃Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions